Liquid dam preparation



EDWARD (3'. MIEIrLlER, 011i WILLIAMSPORT, PENNSYLVANIA.

LIQUID DAIVll PREPARATION.

iaiaoai.

No Drawing.

'1 0 all to from it may concern Be it lrnown that l, EDWARD C. MILLER, a citizen of the United States, and resident o'l' 'Williamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Liquid Dam Preparations of which the tollowing is a specification.

My invention has reference to the provision of a dental formulary for closing the pores of mucous membrane, thereby eliminating the moisture in the field of operation,

thus dispensing with the use. of rubber dams and the like as used in operative dentistry.

It commonly known that moisture in any field of dental operation causes an early disintegration of cement and porcelain, be sides hampering the worlr or the dentist. Heretoiore when atooth has been prepared for filling and the like a rubber darn has been used. to keep moisture from the pre-- pared surface. To accomplish the same and further results in an easier niani'ier than those effected by a rubber dam. l have devised a liquid n'e i uration which retains all of the advantages and eliminates many of the disadvantages of the rubber dam. When cervical margin cavities lie deep under the gum tissues and proximical cavities are very highin the inter-proirimical space,the gum tissues must be forced back so far in order to free all margins of the cavity-that the rubber dam causes an injury to the per-icementum membrane which later develops into per1cement1t1s. There is also el1m1- nated the possibility of the rubber dam be- Specification of Letters Patent.

Application filed. fieptemberBDQ 1920. Serial No. 413,934.

Alcohol" H 99% 1 Formaldehyde l 3 t the oz.

No particular method or proportion is requiredin combining these ingredients.

li/ly composition is applied locally to the gum by any means suitable tothe operator. The application causes a contraction of the pores of the mucous membrane thereby preventing moisture t'rom flowing to the outer surface of the membrane.

Having described the composition and its objects with such attention to detail as will thereby acquaint one skilled in the art with its preparation and advantages, I claim.

A. liquid dam preparation comprising a solution of alcohol, menthol in an amount sulllcient to produce an astringency and de hydration of the tissue, and substantially one-half of one per cent of formaldehyde.

In testimony whereof I hereunto affix my signature.

EDWARD C. MILLER. 

